Crucible



July 20, 1926.

,H. GEISENHfiNER CRUCIBLE Filed {Way 18, 1923 Fig.5.

Fig. 2.

Inventor Henry Geisenhoner.

HIS Attorney I MV/AV Patented July 20, 1926.

UNITED STATES PATENT OFFICE.

HENRY GEISENHONEILOI SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELEC- TRIO COMPANY, A CORPORATION OF NEW YORK.

CRUCIBLE.

Application filed May is, 1923. Serial No. 639,899.

My invention relates to crucibles for mol ten metals and has for its object the provision of means whereby the molten metal may be thoroughly mixed.

In the melting of various metals it is often necessary to stir the molten charge for the purpose of forming a homogeneous mixture. This is particularly truein the making of alloys.

In carrying out my invention I provide internal projections on the crucible for the molten metal whereby the metal may be mixed by rocking the crucible so as to cause the molten metal to flow over the projections.

For a more complete understanding of my invention reference should be had to the accompanying drawing in which Fig. 1 is a vertical section View of a furnace constructed in accordance with my invention; Fig. 2 is a fragmentary horizontal section View; while Fig. 3 is a fragmentary vertical section view taken at right angles to Fig. 1.

Referring to the drawing, I haveshown my invention in one form as applied to a well known type of electric furnace comprising a heat refractory crucible 10 into which extend carbon electrodes 11 and 12 which are adapted to form arcs with cooperating stationary electrodes 13 and 14 in the interior of the crucible. The stationary electrodes 18 and let are connected to the opposite side of a suitable supply circuit through conductors 15 and 16. It will be understood, however, that my invention is not limited to electric furnaces but is applicable to any melting furnace regardless of the character of its source of heat. In fact, my invention is applicable to any crucible for molten metal, such as a ladle, which is capable of being rocked.

In accordance with my invention I provide projections 17 in the bottom of the crucible which extend upward into the molten metal 18. In the form shown these projections are formed by making alternate bricks at the bottom of the crucible, forming a heat refractory lining therefor slightly longer than the others so that their upper ends protrude. The elongated bricks in each row or series are arranged with respect to the next adjacent row so that the projections are in staggered relation as viewed from the mouth 19 of the furnace.

In the making of alloys, for example, the various metals forming the alloy will be melted after which the metals will be throughly mixed by slowly rocking the crucible back and forth several times. The metals may and often are melted separately and mixed in the crucible. To provide for tilting the crucible, it may be provided on the bottom with curved supporting tracks 20 each of which rests on a pair of rollers 21 and 22. The crucible may be tilted on the rollers by turning a spur gear 23 which meshes with a gear segment 24 on the bottom of the furnace. This manner of mounting is common in furnaces of this type and is used to permit the furnace to be tilted so that the molten charge can be poured from the mouth 19. When the furnace is rocked to stir the charge, it will be observed that the charge will flow over the projections 17 and also between them as indicated by the arrows in Fig. 2. The charge is thus thoroughly stirred so as to form a homogeneous mixture. The projections 17 may be placed in any part of the crucible wall where they would be engaged by the molten metal as the furnace is rocked.

While I have described my invent-ion as embodied in concrete form and as operating in a specific manner in accordance with. the provisions of the patent statutes, it should be understood that I do not limit my invention thereto, since various modifications thereof will suggest themselves to those skilled in the art without departing from the spirit of my invention, the scope of which is set forth in the annexed claims.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. A crucible for molten metal provided with a lining of bricks, alternate bricks project-ing into the interior of the crucible, and

means for tilting said crucible so as to cause the molten metal to flow over and between said projecting bricks, whereby the metal is stirred.

2. A crucible for molten metal provided with a bottom lining, comprising heat refractory bricks of unequal length the longer bricks being arranged in staggered relation and having their ends projecting upward from the bottom of the crucible, and means for rocking said crucible so as to cause the molten metal to flow over and be tween said projecting ends.

In witness whereof I have hereunto set my hand this 17th day of May,

HENRY GEISENHONER.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,593,399, granted July 20, 1926,

upon the appli ation of Henry Greisenhoner, of Schenectady, New York, foran i111- proveinent in Crucibles, errors appear in the printed specification requiring correction as follows: Page 1, after line 93, insert the following as claim 1 1. A crucible for molten metal provided with internal projections arranged in etaggereel relation, and means for tilting said eraoible so as to cause the molten metal to flow into engagement with satcl projections whereby the metal is mined. same page, line 9%, ,for the ordinal of claim 1 read 2,- and page 2, line 5, for the ordinal of claim 2 read 3; and that the said Letters Patentshould be read With these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 28th day of September, A. D. 1926.

[snAn] M. J. MOORE, Acting Uommz'sstoner of Patents.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,593,399, granted July 20, 1926, upon the application of Henry Geisenhoner, of Schenectady, New York, foran lID- provenient in crucibles, errors appear in the printed specification requiring correction as follows: Page 1, after line 93, insert the following as claim 1 LA oraeible for molten metal provided with internal projections arranged in staggered relation, and means for tilting said crucible so as to cause the molten metal to flow into engagement with said projections whereby the metal is mixed. V same page, line 94-, ,for the ordinal of claim 1 read 2; and page 2, line 5, for the ordinal of claim 2 read 3,- and that the said Letters Patent should be read with these corrections therein that the same may conform to the. record of the case in the Patent Oflice.

Signed and sealed this 28th day of September A. D; 1926.

[SEAL] M. J. MOORE, 7 Acting Commissioner of Patents. 

